Gas-engine bearing



UNITED srngns Prnn'r OFFICE.

WALTER F. KASPER, OF FAIRMONT, MINNESOTA, ABSIGNOR T0 FAIRMONT GASENGINE & RAILWAY MOTOR CAR C0., 0F FAIRMONT, MINNESOTA, A. COBfSpecification of Letters Patent.

GAS-'ENGINE BEARING'.

Application led April 5, 1919. Serial No. 287,801. i

To Z5 whom t may concern:

Be it known that I, WALTER F. Klieren, a citizen of the' United States,resident of Fairmont, county of Martin, State of Minnesota, haveinvented certain new and useful Improvements in Gas-Engine Bearings, ofwhich the following is a specification,

My invention relates in general to antil friction or rolling bearingsfor gas engine crank shafts and the object of the invention is toprovide gas tight anti-friction bearings for the crank shaft of gasengines and particularly for gas engines of the two-cycle type in whicha mixture of hydro-carbon fuel and air is precompressed in thc crankchamber of the engine. For various reasons it is very important in thisclass of engines that 11o leak of air, gas or oil should occur throughthe bearings around the crank shaft, and it is also very desirable thatengines, especially of high speed, should be provided with roller orball bearings. I therefore rovide means in connection with thesebearings for rendering impossible the escape of air or gas from thecrank chamber to the air even under moderately high com nression inthechamber.

Mly invention consists in certain constructions and combinationshereinafter described and particularly pointed out in the claims, takenin connection with the accompanying drawings in which, 0 f

Figure 1 is a vertical transverse section of l a 4gas engine through thecrank chamber arid crank shaft bearings, having my invention appliedthereto,

Fig. 2 is an enlarged sectional View ofa ball bearing having myinvention applied thereto,

Fig. 3 is a section on the line 3-63 (of Fig. 2.

n the drawings, 4 represents the crank chamber of the base 5 of atwo-cycle gas enh gine, having the usual bored and faced openings 6 and7 throu h which the crank shaft 8 ris admitted. eads 9 and 1() securedby bolts 11 to the base 5 close the o konings 6 and 7 and form air andas tight joints with the base 5. The hea s 9 and 1 are recessed to admitthe outer races 12 fdr the balls 13 and the inner races 14 are fittedsnugly around the raised portions 15 of the crank shaft 8. Collars 16bearing against the crank arm shoulders 17 and washers 1S held in placeby the sleeves 19 keep the inner races 14 from lateral movement on theshaft. The sleeves 19 have a pressed air-tight fit on the crank shaftand abut the hubs 2() of the fly wheels 21 which are splined to thecrank shaft 8, preferably by keys 22. The reduced ends 23 of the crankshaft are threaded and by means of the threaded nuts 24 and lock Washer24, the fiy wheels 2l, sleeves 19, washers 18, inner ball races 1 4 andcollars 16, niapbe drawn up snugly and locked in place aiiist theshoulders 17 of the crank shaft. ne of the outer ball races 12,preferably the race in the head 10, is held against end thrust by meansof the shoulder 26 in the recess of the head 10 and the shoulder 2T inthe cover 28. The outer ball race 12 in the head 9 is Vfree to floatwith the inner race to compensate for slight variations in length by.heat expansion or other causes to which the parts may be subjected. Inorder to prevent gas or air under compression in the crank charnber 4from passing between the balls 13 to the outer air I provide theauxiliary heads or covers 25 and 28 having air tight con nections withthe heads 9 and 10 and secured by means oi bolts or screws 30not shown,on cover 28.

The covers 25 and 28 have cylindrical extensions 31 provided 'withrecesses 32 in the bottom of which is a cup-shaped annular flange 33loosely fitting the sleeve 19. A series of sealing washers 34 of softfelt or other yielding and porous material, are pressed over the sleeves19 and into the re cesses 32, and a cup-shaped metal collar 35 isloosel, inserted in the recesses against the packing washers. A coiledspring 36 is adapted to bear'against the collar 35 and pressure isexerted against the spring by means of washers 37 held in place in therecess by a spring clasp 38, fitting a groove in thesurrounding wall ofthe recess. The

pressure ofthe spring 36, acting on the cu shaped collar 35, com ressesthe fe t Washers against the rotating sleeve 19 and the fiange 33 andeffectually seals the crank sleeve for clamping that various modi-fiedconstructions of the bearings might be adopted without departinr fromthe principle of the invention.

churn es my invention: In e gus engine, the ooinlii'natioinlwith ueasing and a crank shaft having an Inner shoulder adjacent the cranlcarms, of anti friction hearings having an inner .fiufl an outer raremounted on said crank shaft and in said Casin a sleeve slidin ly fittingupon said crank s aft to rotate t erewith, a fly wheel on'said shaftabutting said sleeve, threaded means for forcing said fly wheel againstthe sleeve, and means cooperating with the sleeve for clamping the innermee of the hearing against seid shoulder of the crank shaft.

2. In a gas engine, the combination, with a casing and a crank shafthaving a Shoulder adjarent the Crank avm`4 nl' anfi-l'rir-fion hearingshaving inner and outer raies: mounted on said rranli shaft und in Saideasing' respectively, a sleeve slidingly fitted tu said crank shaft torotate therewith, a vlindrical chamber surrounding said sleeve.ryielding packing ringe` arranged upon the sleeve in said chamber,springpressed means for forcing said packing rings against the peripheryof said slee-ve and the Walls of said chamber, and threaded meanscooperating with the crank shaft and the the inner rece of the 4saidcrank shalt and hearing against said shoulder of the crunk shaft.

3. 1n a gasa engine, the combination, with a casing and a crank `Qhafthevingr shoulders itdjaeel'it the crank arms, ol antil'1'icti n hearingshavingr inner races mounted upon aliutlingl said shoul ders, outerrares,- lm .Suid hearings`y ina/in housings uonneeted to the easing forsaid hearings, auxiliary housings connected to said main housings, meansconnected with said, main and auxiliary housings for holding one of saidouter races against movement and letting the other fioat laterally, ac/lindrioal chamber surrounding said crank surft in said auxiliaryhousings, a sleeve slidingly mounted upon said crank-shaft within saidelu-imhor tri rotate with Saul AQhaf't, parking' ringe' arranged uponsans' Sleeve within said rluiinhw. inn-innprim-wl umani; l'or l'fuuiuesah? 'flanking nu;l y1 ugninl thiA ),-vrphmy ol' ,wahl shaw# und againstthe n'nlli-` mi' salu' nhainlui. :Hui ineanu amper-[umn] with .willArauh shall and said sieri# l'fu {fu-ving ilu inner ru against tlulshoulder-s nl' Awahl Tank shaft in witness ulufrnnf, l have hereunto w1!my hand this 29 day of lflerch, i919.

WALTER F. KASPER.

Viitness:

JOHN W. LovELL.

